- #1
IPhO' 2008
- 44
- 0
I can't prove the Newton's third law.
Please tell me how to prove the Newton's third law.
Thanks.
Please tell me how to prove the Newton's third law.
Thanks.
More correctly, like all physics laws, they are derived from experiment.f95toli said:You can't prove Newtons laws...
They are postulates, meaning they are assumed to be true.
Jeff Reid said:I don't know if Newton derived his third law mathematically from his other laws or from observation of a relationship between forces and accelerations of varying objects, or from the fact that in any closed system, all internal forces must cancel.
Newton's third law states that for every action, there is an equal and opposite reaction.
Yes, a common example is when you push a book on a table, the book exerts a force on the table and the table exerts an equal and opposite force on the book, keeping it in place.
Newton's third law can be proven mathematically by using the equation F=ma, where F represents force, m represents mass, and a represents acceleration. If two objects are experiencing forces in opposite directions, their accelerations will be equal in magnitude but opposite in direction, thus satisfying Newton's third law.
Yes, Newton's third law is applicable to all situations as it is a fundamental law of physics that governs all interactions between objects.
Newton's third law is closely related to the principle of conservation of momentum, which states that the total momentum of a system remains constant in the absence of external forces. This is because the equal and opposite forces in Newton's third law result in equal and opposite changes in momentum, canceling each other out and keeping the total momentum constant.